Mill Valley
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Mill Valley Weather in May

May in Mill Valley sees daytime temperatures around 20°C (68°F) and lows of 10°C (50°F) at night. The excellent weather makes it a good time to visit.

Rainfall in Mill Valley in May

This month experiences about 3 days of rain according to historical data, averaging 17 mm (0.7 in). When rain does fall, showers tend to be light and brief. Most days will be dry.

Temperature in Mill Valley in May

If you're visiting Mill Valley in May, expect excellent temperatures with highs of 20°C (68°F) and overnight lows of 10°C (50°F). Conditions are often most pleasant around the middle of the day. Nights fall to 10°C (50°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Mill Valley in May

The days are predominantly sunny, with an estimated total of around 324 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

Mill Valley Temperature in May

Min Temperature
10°C (50°F)
Max Temperature
20°C (68°F)
Chance of Rain
10%
Precipitation
17 mm (0.7 in)
Rainy days
3 days
Humidity
72% *
Sunshine
324 hours *
Percentage Sunshine
73% *
* Data from: San Francisco, the United States of America (35 KM, 21 Miles).

Mill Valley Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Mill Valley - and find the best time to visit.

Best Places in the United States of America in May

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Mill Valley in May

Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Dry conditions mean you won't need to worry about rain protection. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Mill Valley in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Cycling
    10/10
  • Walking
    10/10
  • Camping
    5/10
  • Outdoor sports
    10/10

Mill Valley 3-Day Forecast

Popular in May

Where to go in May - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.